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Preparation method and evaluation method of farmland soil improvement agent

A soil improver and farmland technology, which is applied in the restoration of polluted soil, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of single function of improver, reduced adsorption performance, and restriction of large-scale use, achieving scientific and effective results Good, improve the adsorption performance, realize the effect of resource utilization

Inactive Publication Date: 2019-11-15
延桄环境修复(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a method for preparing farmland soil improver to overcome the single function of the improver in the prior art, poor stability, and the reduction of adsorption performance under the long-term action of the soil environment. Obvious, and relatively high, technical issues that would limit mass use;

Method used

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  • Preparation method and evaluation method of farmland soil improvement agent
  • Preparation method and evaluation method of farmland soil improvement agent
  • Preparation method and evaluation method of farmland soil improvement agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] After air-drying the wheat straw (the water content is less than 10%), it is placed in an open container for combustion. The material of the open container is a stainless steel cylindrical barrel with a height of 1 m and a width of 0.3 m at the bottom; Purification equipment, made into farmland soil conditioner.

[0044]The farmland soil conditioner is mixed evenly with the organically polluted farmland soil; the addition and mixing of the farmland soil conditioner can be done manually or mechanically, and the farmland soil conditioner can be added to the surface of the farmland soil, and then mixed with The farmland soil is mixed evenly, which is simple and convenient; the addition amount and mixing method are determined according to the area of ​​the polluted farmland soil, the pollution status (organic substance type, concentration, distribution), the treatment target and the adsorption performance of the improver.

Embodiment 2

[0046] Before putting the farmland soil improver into the farmland soil, it is necessary to determine the optimal dosage ratio of the improver under laboratory conditions according to the evaluation of the adsorption performance of the contaminated soil improved by different improvers and the growth of plant organisms.

[0047] Evaluation method of farmland soil conditioner:

[0048] Step 1, adopt the density classification method and repeated pickling method to process, obtain the light component, heavy component and carbon-based component in the farmland soil conditioner; the solution used by the density classification method, the density standard is 2.05g / cm 3 , prepared by mixing dichlorodibromomethane and n-hexane, adding the adsorbent to the prepared solution, floating on the liquid surface as light components, heavy components sinking to the bottom of the solution, and filtering out light components respectively Components and heavy components are dried for later use....

Embodiment 3

[0060] In the following, the adsorption effect experiment of the farmland soil improver prepared by this method is carried out in combination with the above evaluation method, to evaluate the adsorption performance and adsorption stability of the farmland soil improver, and to verify the improvement effect of the farmland soil improver on polluted soil.

[0061] (1) Preparation of farmland soil conditioner and characterization of adsorption performance: After the air-dried wheat straw was burned in the open, the straw ash was collected as the applied farmland soil conditioner, and the farmland soil conditioner was treated with density classification and repeated pickling. agent to obtain light components, heavy components and carbon-based components in the improver. Using the obtained components at all levels, wheat straw, the farmland soil amendment and the test soil (with an organic matter content of 2.1%) as adsorbents, the adsorption experiment of diuron, a typical soil org...

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Abstract

The invention provides a preparation method of a farmland soil improvement agent. The preparation method comprises the following steps: collecting crop straws and performing full airing; placing the aired crop straws in an open container, lighting the straws, and enabling the straws to perform inadequate combustion; and collecting residual straw ash components after combustion so as to obtain theprepared improvement agent. The invention further provides an evaluation method of the farmland soil improvement agent. According to the preparation method, the organic contamination farmland soil improvement agent is eco-friendly, excellent in adsorptive property, long-term stable, low in price and convenient to prepare and use, and by adopting the evaluation method, problems of improvement agents used by the conventional farmland soil remediation technology are solved.

Description

technical field [0001] The invention relates to the field of soil restoration, in particular to a preparation method and evaluation method of a farmland soil conditioner. Background technique [0002] The rapid economic development has caused a great burden on the ecological environment. Following the water pollution prevention and control plan, the Ministry of Environmental Protection and other relevant departments have launched a soil pollution prevention and control plan to curb the momentum of soil pollution and further strengthen the restoration of polluted sites. [0003] The production activities of chemical factories and the application of pesticides in farmland will cause organic pollution of farmland soil. Some organic pollutants are persistent and accumulative, and enter the human body through the food chain, causing serious harm to human health. At present, the methods of remediation of organic pollutants in farmland soil mainly include physical methods, chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/02B09C1/00G01N30/06
CPCB09C1/00C09K17/02G01N30/06
Inventor 高娟郁祁何岸飞于子近
Owner 延桄环境修复(苏州)有限公司
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